These are a compilation of cheat codes I found on different old websites

Descriptions of each ones are self explanatory

- Infinite Health
0206f508 e5970540
0206f50c e587053c

- Never Die
0206f50c e3a00001

- Max Upgrade Points
0204384c e3a01302
02043850 e58418d8
02043854 e58d1004

- Infinite Breath
02071604 e3a01919

- Moon jump
02095b78 e0410000
94000130 fffd0000
02095b78 e3a00a01
d2000000 00000000

- Super Moon jump
02095b78 e0410000
94000130 fffd0000
02095b78 e3a00a02
d2000000 00000000

- Fast Kills
02064f98 e3a02000
02064fa4 e5852540

Of course make sure to disable them before doing a legit run.

Additional Reference

- http://uk.codejunkies.com/search/codes/The-Legend-of-Spyro--The-Eternal-Night_Nintendo-DS_17826310-17___.aspx

Cheats

Hod_Strat

The Legend of Spyro: The Eternal Night (DS)

Nintendo DS

ShadowKnight28

Spyro

Spyrothon for the weekend

RubberDuckyAssassin

Newantox

Tris255

GingeSwagTia

wafflewizard1